How to change the header colour (color) of a Spark DataGrid in Adobe Flex?

Is there a simple way to do this? (Change the colour of the headings in a Spark DataGrid in Adobe Fl开发者_运维技巧ex. They are black by default)

I'm a complete beginner to FlashBuilder / Flex - and can't find any easy solution.

---

This blog post now provides a code sample, and answers the question:

http://flex6packs.wordpress.com/2011/06/22/spark-datagrid-skinning-custom-column-header-colours/